A close mouth catcheth no flies.

The proverb presents silence as a safeguard: someone who does not speak cannot let an unwise remark slip out.

It counsels restraint when speaking would add little but might cause embarrassment or trouble. Its point is not that one should never speak, but that words are worth choosing carefully.

Use it to advise someone against a hasty remark, or to explain a choice to remain silent in a tense conversation. It fits situations where speaking impulsively carries more risk than saying nothing.